Attachment for tracker-bars.



T. DANQUARD. j

ATTACHMENT FOR TRACKER BARS.

APPLICATION HLED MAY 20. 1915.

1,173,652. Pafiented Feb. 29,1916. 1451.

W it-mess y Qaav-ng s UNITED STATES ra'rnnr onrion THOMAS DANQUARD, OF NEW YORK, N. Y ASSIGNOR T AUTO PNEUMATIC ACTION COMPANY, OF NEW YORK, N. 3., A. CORPORATION OF NEW YORK.

ATTACHMENT FOB rehearse-sans.

Specification oi Eetters Yatent.

Patented Feb. 29, 1916.

Application filed May 20, 1916. Serial No. 29,9 43.

,Bars, of which the following is a specifica- It is found in practice that when a tracker-bar of an automatic playing 1nstrument 1s provlded with perforations beyond the end of the range for controlling certain operations there is danger, especially when playing from large rolls, that through the fluttering of the paper or other causes the wind will enter into one or more of the periterations and thus at the wrong time cause an operation, such as re-rolling, restarting, stopping, and the like. This is particularly the case when re-winding because the paper necessarily travels at a rapid rate.

The principal object of this invention is to provide a simple and convenient means for assuring the contactv of the sheet with the tracker-bar at the ends no matter how fast or inaccurately it is traveling.

Reference is to be had to the accompanying drawings, in which Figure 1 is a front elevation of a trackerbox with a preferred embodiment of this invention applied to the tracker-bar; Fig. 2. is a similar view of one end of the trackerbar on enlarged scale; Fig. 3 is a sectional view on the line 3-3 of Fig. 2 showing the edge of the tracker-bar; and Fig. 4 is a sectional view on the line 4-4 of Fig. 2.

The invention is shown as applied to an instrument having a tracker-bar 10 provided with the usual range openings 11 and also provided with additional openings 12 and 13. This invention is designed to prevent the sheet from being separated from the tracker-bar when passing over these openings.

For this purpose the invention is shown in a form in which it comprises a guard 25 in the form of a wire member or clip. This is shaped substantially to the shape of the top of the tracker-bar and has integral legs 16 which are bent at 17 to provide pivots.

These pivots are inserted in opposite holes- -of the tracker-bar and consequently the whole device is capable of swinging about them. At one side this clip'is provided with an integral offset 18 which bears on a spring 19' which normally keeps the clip in contact with the paper or bar. When it is desired to insert a sheet the clip can be turned over and then the spring will act on the sameprojection when located on the opposite side of the pivot and hold the clip open. The clips are then thrown inwardly and will act with a light spring pressure to prevent the edges of the sheet fluttering enough to admit air to the perforations 12 and 13 and thelike. in this way it will be seen that this difiiculty is avoided by a very simple mechanism which adds very little to the expense and contains no parts likely to get out of order, and can be manipulated by any person without personal instruction.

Although I have illustrated and described only a single embodiment of the invention, I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims.

' Therefore I do not wish to be limited to all the details of construction herein shown and described, but- What I do claim is 1. The combination with a tracker-bar, of means located at the end of the tracker-bar and mounted thereon for holding the edge of a note sheet closely against the trackerbar while the note sheet passes over the same.

2. The combination with a tracker-bar having openings in position to come under the edge of the music sheet, of a clip mounted near the end thereof for holding the edge of the music sheet in close contact with the tracker-bar so as to prevent the accidental uncovering of said openings.

3. The combination with a tracker-bar, of yielding means transversely pivoted thereon for holding a music sheet against the surface of the tracker-bar.

As an article of the class described, an attachment for a tracker-bar comprising a clip made of bent Wire shaped substantially to fit the front of the tracker-bar and havingtwo ends pivoted to the opposite sides of the tracker-bar, and a spring adapted to engage the clip and hold the clip either in operative or inoperative position with yielding pressure.

5. The combination with a tracker-bar, of a clip formed of a single piece of wire and having a pair of opposite ends pivoted in the sides of the tracker-bar, the main portion of the clip constituting a bar adapted to lie on the surface of a music sheet on the tracker-bar to hold the music sheet in position, said clip having an integral offset portion adjacent to one of the pivotal ends and extending beyond the same, and a spring in position to engage said offset portion when located on either side of its pivot for holding the clip in operative or inoperative position with a yielding pressure.

6. The combination with a tracker bar of means comprising a clip for each end of the tracker bar and secured ;0 said tracker bar to bear against the note sheet margins 1 onlv for pressing the margins of the note sheet against the surface of the tracker bar,

In testimony whereof I have hereunto set my hand, in the presence of two subscrib ing witnesses.

THOMAS DANQUARD. Witnesses:

WILLIAM J. BARTON, V. (J. H. SCHWARZ 

